Answer / ganeswar sahu

To check the phase angle displacement between two
windings of a manufactured traformer and to check whether
internal winding connection is matching to the vector group
as mentioned in the name plate .

Answer / raju.t

1. To check the phase angle displacement between two
windings of a manufactured trafo.
2. To check the correctness of vector group mentioned in
the name plate of trafo and actual connection.

Answer / jagdish krushnarao zeliye

vector group of transformer is used to know the phase angle
for parallelling operation

Answer / saba anjum

vector group are made to know at what position the secondary
winding of transformer we get star and delta voltages . and
it indicates the type of winding in primary and secondary
which helps in parallel operation of transformer with
different ratings having same vector group .

Answer / purav solanki.

for the parallel operation of two transformer.

Answer / usama badran ali

vector group analysis used for two important things?
1-it describes the charcteristic of transformers...how?
1-primary and secondary connections.
2-low and high voltage sides.
3-leading angle between high and low voltages.
2-to connect two parallel transformer, you should know the
line to line voltages of two transformer (i mean each
similar line voltages of the parallel transformers ).
3-in the modern technolgy of power electronics in three
phase inverters i can eleminate fixed order of harmonics by
changing the transformer connection .

Answer / saksh

to check the phase angle displadement so as to know the
power factor itis lag or lead

Answer / kulu

TO Check the phase displacement between HV winding and Lv
winding

Answer / ramama

for parallel operation of two different rating transformers

Answer / ganesh nayak

Vector anlysis is done to check whether the transformer
under test is suitable for parallel operation with another
transfomer having same vector group and voltage ratio but
difference in KVA rating.And to know the phase displacment
and polarity of the transformer.

who can measure the size of power cable?

0 Answers   Chanar Sugar Mills,

For a three phase induction motor, what will be the effect on motor if the neutral of the system is shifted to say 20 deg.?

0 Answers  

MY QUATION IS ABT THE MAIN POWER TRANSFORMER IN STEEL PLANT , I WISH TO KNOW THAT WHY TRANSFORMER PROTECTION NOT TRIP AS CABLES ON THE SECONDAY SIDE IS WATER COOLED. TRANFORMER DETAIL NORMAL KVA--150 KVA PRIMARY VOLTAGE --34.5 KV SEC.NO-LOAD VOLTAGE---1.290-908-690V ( WITH PRIMARY DELTA CONNECTED) CONNECTION--D/d (EXTERNAL CLOSED) CONSTANT RATEING FROM--1.290-908V CONSTANT CURRENT FROM--908-690 VECTOR GROUP--D III

1 Answers  

how much watts are equal to one unit of energy meter?

9 Answers  

ouestion for the post of section engineer

1 Answers   BSNL, RRB,

How to check the specific gravity of the two 12 V batteries connected in series to a 24 V UPS and inverter ? will we have to disconnect all the connections and turn off the UPS and inverter or not ? will we have to check specific gravities in each cell of the two batteries ? what is the name of the instrument that is used to check the specific gravity and whats the procedure to check the specific gravity with it ? thanks

2 Answers  

Maximum efficiency occurs in electrical machines is at i)Full load,ii)50% of full load,iii)Near full load,iv)None of these

1 Answers   IFFCO,

Why Generator KVA not in KW ?

3 Answers   Bygging India, HHH, Tata Motors, TVS,

why we are using DC supply for all protection relays, why cant we use AC supply..???

1 Answers  

what happens when series resonance occurs?

0 Answers  

What meant by XLPE cable

3 Answers  

why do we have 230v a.c. as general voltage for domestic supply rather than others?

2 Answers